diff --git a/src/sys/driver.c b/src/sys/driver.c
index 59d969eb..1dbba6b6 100644
--- a/src/sys/driver.c
+++ b/src/sys/driver.c
@@ -75,11 +75,11 @@ DriverEntry(
     FspFastIoDispatch.FastIoUnlockAll = 0;
     FspFastIoDispatch.FastIoUnlockAllByKey = 0;
     FspFastIoDispatch.FastIoDeviceControl = 0;
-    FspFastIoDispatch.AcquireFileForNtCreateSection = 0;
-    FspFastIoDispatch.ReleaseFileForNtCreateSection = 0;
+    FspFastIoDispatch.AcquireFileForNtCreateSection = FspAcquireFileForNtCreateSection;
+    FspFastIoDispatch.ReleaseFileForNtCreateSection = FspReleaseFileForNtCreateSection;
     FspFastIoDispatch.FastIoDetachDevice = 0;
     FspFastIoDispatch.FastIoQueryNetworkOpenInfo = 0;
-    FspFastIoDispatch.AcquireForModWrite = 0;
+    FspFastIoDispatch.AcquireForModWrite = FspAcquireForModWrite;
     FspFastIoDispatch.MdlRead = FsRtlMdlReadDev;
     FspFastIoDispatch.MdlReadComplete = FsRtlMdlReadCompleteDev;
     FspFastIoDispatch.PrepareMdlWrite = FsRtlPrepareMdlWriteDev;
@@ -89,22 +89,11 @@ DriverEntry(
     FspFastIoDispatch.MdlReadCompleteCompressed = 0;
     FspFastIoDispatch.MdlWriteCompleteCompressed = 0;
     FspFastIoDispatch.FastIoQueryOpen = 0;
-    FspFastIoDispatch.ReleaseForModWrite = 0;
-    FspFastIoDispatch.AcquireForCcFlush = 0;
-    FspFastIoDispatch.ReleaseForCcFlush = 0;
+    FspFastIoDispatch.ReleaseForModWrite = FspReleaseForModWrite;
+    FspFastIoDispatch.AcquireForCcFlush = FspAcquireForCcFlush;
+    FspFastIoDispatch.ReleaseForCcFlush = FspReleaseForCcFlush;
     DriverObject->FastIoDispatch = &FspFastIoDispatch;
 
-    /* setup filter callbacks */
-    FS_FILTER_CALLBACKS FspFilterCallbacks = { 0 };
-    FspFilterCallbacks.SizeOfFsFilterCallbacks = sizeof FspFilterCallbacks;
-    FspFilterCallbacks.PreAcquireForSectionSynchronization = FspAcquireForSectionSynchronization;
-    Status = FsRtlRegisterFileSystemFilterCallbacks(DriverObject, &FspFilterCallbacks);
-    if (!NT_SUCCESS(Status))
-    {
-        IoDeleteDevice(FspDeviceObject);
-        return Status;
-    }
-
     /* register as a file system; this informs all filter drivers */
     IoRegisterFileSystem(FspDeviceObject);
 
diff --git a/src/sys/driver.h b/src/sys/driver.h
index 84d67c4b..e07c1d4c 100644
--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -43,10 +43,12 @@ DRIVER_DISPATCH FspWrite;
 FAST_IO_CHECK_IF_POSSIBLE FspFastIoCheckIfPossible;
 
 /* filter callbacks */
-NTSTATUS
-FspAcquireForSectionSynchronization(
-    _In_ PFS_FILTER_CALLBACK_DATA Data,
-    _Out_ PVOID *CompletionContext);
+FAST_IO_ACQUIRE_FILE FspAcquireFileForNtCreateSection;
+FAST_IO_RELEASE_FILE FspReleaseFileForNtCreateSection;
+FAST_IO_ACQUIRE_FOR_MOD_WRITE FspAcquireForModWrite;
+FAST_IO_RELEASE_FOR_MOD_WRITE FspReleaseForModWrite;
+FAST_IO_ACQUIRE_FOR_CCFLUSH FspAcquireForCcFlush;
+FAST_IO_RELEASE_FOR_CCFLUSH FspReleaseForCcFlush;
 
 /* extern */
 PDEVICE_OBJECT FspDeviceObject;
diff --git a/src/sys/resource.c b/src/sys/resource.c
index cf85be6d..6f5a10d7 100644
--- a/src/sys/resource.c
+++ b/src/sys/resource.c
@@ -6,22 +6,92 @@
 
 #include <sys/driver.h>
 
-NTSTATUS
-FspAcquireForSectionSynchronization(
-    _In_ PFS_FILTER_CALLBACK_DATA Data,
-    _Out_ PVOID *CompletionContext);
+FAST_IO_ACQUIRE_FILE FspAcquireFileForNtCreateSection;
+FAST_IO_RELEASE_FILE FspReleaseFileForNtCreateSection;
+FAST_IO_ACQUIRE_FOR_MOD_WRITE FspAcquireForModWrite;
+FAST_IO_RELEASE_FOR_MOD_WRITE FspReleaseForModWrite;
+FAST_IO_ACQUIRE_FOR_CCFLUSH FspAcquireForCcFlush;
+FAST_IO_RELEASE_FOR_CCFLUSH FspReleaseForCcFlush;
 
 #ifdef ALLOC_PRAGMA
-#pragma alloc_text(PAGE, FspCreate)
+#pragma alloc_text(PAGE, FspAcquireFileForNtCreateSection)
+#pragma alloc_text(PAGE, FspReleaseFileForNtCreateSection)
+#pragma alloc_text(PAGE, FspAcquireForModWrite)
+#pragma alloc_text(PAGE, FspReleaseForModWrite)
+#pragma alloc_text(PAGE, FspAcquireForCcFlush)
+#pragma alloc_text(PAGE, FspReleaseForCcFlush)
 #endif
 
-NTSTATUS
-FspAcquireForSectionSynchronization(
-    _In_ PFS_FILTER_CALLBACK_DATA Data,
-    _Out_ PVOID *CompletionContext)
+VOID
+FspAcquireFileForNtCreateSection(
+    _In_ PFILE_OBJECT FileObject)
 {
-    UNREFERENCED_PARAMETER(Data);
-    UNREFERENCED_PARAMETER(CompletionContext);
+    UNREFERENCED_PARAMETER(FileObject);
+
+    PAGED_CODE();
+}
+
+VOID
+FspReleaseFileForNtCreateSection(
+    _In_ PFILE_OBJECT FileObject)
+{
+    UNREFERENCED_PARAMETER(FileObject);
+
+    PAGED_CODE();
+}
+
+NTSTATUS
+FspAcquireForModWrite(
+    _In_ PFILE_OBJECT FileObject,
+    _In_ PLARGE_INTEGER EndingOffset,
+    _Out_ PERESOURCE *ResourceToRelease,
+    _In_ PDEVICE_OBJECT DeviceObject)
+{
+    UNREFERENCED_PARAMETER(FileObject);
+    UNREFERENCED_PARAMETER(EndingOffset);
+    UNREFERENCED_PARAMETER(ResourceToRelease);
+    UNREFERENCED_PARAMETER(DeviceObject);
+
+    PAGED_CODE();
+
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+FspReleaseForModWrite(
+    _In_ PFILE_OBJECT FileObject,
+    _In_ PERESOURCE ResourceToRelease,
+    _In_ PDEVICE_OBJECT DeviceObject)
+{
+    UNREFERENCED_PARAMETER(FileObject);
+    UNREFERENCED_PARAMETER(ResourceToRelease);
+    UNREFERENCED_PARAMETER(DeviceObject);
+
+    PAGED_CODE();
+
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+FspAcquireForCcFlush(
+    _In_ PFILE_OBJECT FileObject,
+    _In_ PDEVICE_OBJECT DeviceObject)
+{
+    UNREFERENCED_PARAMETER(FileObject);
+    UNREFERENCED_PARAMETER(DeviceObject);
+
+    PAGED_CODE();
+
+    return STATUS_NOT_IMPLEMENTED;
+}
+
+NTSTATUS
+FspReleaseForCcFlush(
+    _In_ PFILE_OBJECT FileObject,
+    _In_ PDEVICE_OBJECT DeviceObject)
+{
+    UNREFERENCED_PARAMETER(FileObject);
+    UNREFERENCED_PARAMETER(DeviceObject);
 
     PAGED_CODE();